Mailing tube



June 12, 1928. 1,673,081 I H. z. LANDON MAILING TUBE;

Filed March 5, 1927 lnvenTor. 1

HoraceZ.\ und0n MW W A'lfys;

Patented June 12, 1928.

UNITED STATES HORACE Z. LANDON, OF NEWTON, MASSACHUSETTS.

MAILING TUBE.

Application filed March 5, 1927. Serial No. 173,165.

This invention relates to a mailing tube and method of making the same and has for its object to provide an improved mailing tube which can be inexpensively manufac- 5 tured'but which has marked strength and is provided at its ends with flaps of relatively tough paper that may be folded into the tube to assistin retaining the contents therein.

In order to give an understanding of the invention I have illustrated in the drawings a selected embodiment thereof and one Way of manufacturing the tube which will now be described after which the novel features 1 will be pointed out in the appended claims.

Fig. 1 illustrates a mailing tube embodying my invention;

Fig. 2 is a view showing the manner in which the tube is made;

Fig. 3 is an enlarged perspective view of one end of the tube;

Fig. 4 is a sectional view through one end of the tube showing the flap folded inwardly.

In the drawings the improved mailing tube is indicated generally at l and in its completed form it has projecting from each end a circular flap 2 which is adapted to be tucked into th tube when the latter is used to help retain the contents in the tube.

The mailing tube is of that type which is made by rolling up a strip of paper into tubular form and in Fig. 2, 3 indicates a strip of paper which is of a width equal to the length of the finished tube and which has a. length several times the circumferential dimension of the finished tube. This strip 3 is rolled into tube form over a mandrel or in any suitable way and as it is rolled the various turns of the paper are adhesively united. This may conveniently be done by applying an adhesive coating to the paper either before it is rolled or as it is rolled into tubular form. A tube thus made has laminated walls, each wall comprising a plurality of plies of paper. This of itself is not new as tubes have heretofore been made in this way.

According to my invention, I roll into the tube intermediate of the ends of the strip a piece of relatively tough paper having considerably greater tearing resistance and a higher folding number than the paper of which the strip 8 is formed. This piece of stronger and tougher paper which is rolled into the tube has a dimension transversely of Such a piece of paper is indicated at 4 and in rolling it into the tube I will preferably superpose the section 4 of paper on the strip 3 at some point along its length so that when the strip 3 is rolled up the paper piece 4 will be rolled into the tube and will thus 4 form one of the intermediate plies of the completed tube. So far as the invention is concerned this paper section 4 may be rolled into the tube at any point along the length of the strip 3. Said section 4 may be adhesively united to the strip 3 or merely placed thereon as desired.

Since the paper section 4 has a greater dimension transversely of the strip 3 than the width of the strip the ends 5 of the paper section 4 will project beyond the edges of the strip 3 as shown in Fig. 2. Furthermore, since the dimension of the paper section 4 in the direction of the length of the strip 3 is substantially equal or less than the circumferential dimension of the completed tube said paper section 4 will form in the completed tube one or more of the plies of the wall of the tube which extends entirely around the tube, the ends 5 of the section 4 forming the projecting flaps 2 of the tube.

I propose to use for the paper section 4 a paper having marked strength and tearresisting properties and also preferably a paper having high folding number. I find that so-called kraft paper makes an excellent paper for this purpose as it has these desirable characteristics. The incorporation of a layer or ply of kraft paper in the tube throughout its length adds greatly to its strength and produces a tube which is much stronger than a tube which is made from the strip 3 only..

The strip 3 may be made of relatively inexpensive paper and the addition of the piece 4 of high grade paper not only adds materially to the strength of the completed tube but also provides a tube with a tough flap 2 which will not be easily torn.

It will thus be seen that while a mailing tube embodying my invention is composed largely of paper which is relatively inexpensive yct by incorporating therein a piece of paper a ofincreased strength and which is of a size "to form substantially one complete layer or ply in the tube together with the flaps 2, a mailing tube can be inexpenhigh grade material. Furthermore, a mailmg tube constructed 1n accordaneewvith my invention has greater strength for its weight than a mailing tube which do'e's'uot' have incorporated 'therein"the ply or plies of the kraft paper.

I claim. l I 1. A mailing tube having'it'swalls formed of a plurality of adhesively-united pliesof paper eXtehdin'g the full lehgth of the tube, oiie ofthe intermediate plies being of paper which is'tougher j and has gr-eater tear-resist'ing"'qualitiesfthan the'pap'er of the other plies;said intermediateply ezgtending le'ss 7 full circumferential dist-anee around'the tube but beyond the'end's of the than the tube thereby-to form flaps adapted to be folded into'the tube.

2. The method of making a mailing tube 7 n g V which consists of rolling into tubular form a sively produced Which is relatively strong" and which is provided with flaps 2 of tough,

strip of paper to produce "a tube having laininatedwalls and rolling into the tube as it is formed and between the ends of the strip a section of paper which is tougher and has greater tear-resisting qualities than the paper of said strip, which section of paper hasadimensiontransversely of the strip greater than the width of the strip and a diihensioninthe'directiori of the length of the strip'slightly less than the circumferentia'l dimension of the tube When formed, whereby said Section adds; strength to'the tubea'rid'al'so' the ends of the section provide flaps extending beyond the ends of the tube. In testimony whereof; Ihave signed my nsmeta this specification;

HORAGE Z. pianos. 

